1. Department of Gastrointestinal Surgery, Xiangya Hospital, Central South University, 410008, PR China
2. Department of Oncological Surgery, Affiliated Hospital of Xuzhou Medical College, 221000, PR China
3. Department of Gastrointestinal Surgery, Third Xiangya Hospital, Central South University, 410008, PR China
4. Department of Gastrointestinal Surgery, Guizhou Provincial People's Hospital, 550000, PR China
5. Department of Hepatobiliary Surgery, Affiliated Hospital of Guilin Medical University, 541000, PR China